diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/7800/Atari7800.IMemoryDomains.cs b/BizHawk.Emulation.Cores/Consoles/Atari/7800/Atari7800.IMemoryDomains.cs
deleted file mode 100644
index abc645e827..0000000000
--- a/BizHawk.Emulation.Cores/Consoles/Atari/7800/Atari7800.IMemoryDomains.cs
+++ /dev/null
@@ -1,93 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-using BizHawk.Emulation.Common;
-using EMU7800.Core;
-
-namespace BizHawk.Emulation.Cores.Atari.Atari7800
-{
-	public partial class Atari7800
-	{
-		private List<MemoryDomain> _MemoryDomains;
-
-		private IMemoryDomains MemoryDomains;
-
-		public void SetupMemoryDomains(HSC7800 hsc7800)
-		{
-			// reset memory domains
-			if (_MemoryDomains == null)
-			{
-				_MemoryDomains = new List<MemoryDomain>();
-				if (_theMachine is Machine7800)
-				{
-					_MemoryDomains.Add(new MemoryDomainDelegate(
-						"RAM", 0x1000, MemoryDomain.Endian.Unknown,
-						delegate(long addr)
-						{
-							if (addr < 0 || addr >= 0x1000)
-							{
-								throw new ArgumentOutOfRangeException();
-							}
-
-							if (addr < 0x800)
-							{
-								return ((Machine7800)_theMachine).RAM1[(ushort)addr];
-							}
-
-							return ((Machine7800)_theMachine).RAM2[(ushort)addr];
-						},
-
-						delegate(long addr, byte val)
-						{
-							if (addr < 0 || addr >= 0x1000)
-							{
-								throw new ArgumentOutOfRangeException();
-							}
-							else if (addr < 0x800)
-							{
-								((Machine7800)_theMachine).RAM1[(ushort)(addr & 0x800)] = val;
-							}
-							else
-							{
-								((Machine7800)_theMachine).RAM2[(ushort)addr] = val;
-							}
-						}, 1));
-
-					_MemoryDomains.Add(new MemoryDomainByteArray(
-						"BIOS ROM", MemoryDomain.Endian.Unknown,
-						_bios, false, 1));
-
-					if (hsc7800 != null)
-					{
-						_MemoryDomains.Add(new MemoryDomainByteArray(
-							"HSC ROM", MemoryDomain.Endian.Unknown, _hsbios, false, 1));
-
-						_MemoryDomains.Add(new MemoryDomainByteArray(
-							"HSC RAM", MemoryDomain.Endian.Unknown, _hsram, true, 1));
-					}
-
-					_MemoryDomains.Add(new MemoryDomainDelegate(
-						"System Bus", 65536, MemoryDomain.Endian.Unknown,
-						delegate(long addr)
-						{
-							if (addr < 0 || addr >= 0x10000)
-								throw new ArgumentOutOfRangeException();
-							return _theMachine.Mem[(ushort)addr];
-						},
-						delegate(long addr, byte val)
-						{
-							if (addr < 0 || addr >= 0x10000)
-								throw new ArgumentOutOfRangeException();
-							_theMachine.Mem[(ushort)addr] = val;
-						}, 1));
-				}
-				else // todo 2600?
-				{
-				}
-
-				MemoryDomains = new MemoryDomainList(_MemoryDomains);
-				(ServiceProvider as BasicServiceProvider).Register<IMemoryDomains>(MemoryDomains);
-			}
-		}
-	}
-}